摘要： 利用网上空闲处理机组成动态非专用机群进行分布式并行计算是网络计算的重要研究方向之一，非专用机群面临的一个最重要的问题就是网络流量动态变化和通信延迟造成网络环境的不确定性和计算的不稳定。该文从理论上分析和评估了网络流量对非专用机群计算环境下各种并行任务的影响，并给出了典型的实验结果。

关键词: 分布式并行, 机群, 网络流量, 通信延迟

Abstract: It is currently an important research direction of network computing to build a dynamic non-dedicated cluster by using idle processors on a LAN. The most important issue of non-dedicated is the dynamic variety of network flow and communication delay. It is a major problem to induce the computing instability. This paper tries to analyze theoretically and estimate the influence of network flow to the various parallel tasks running in a non-dedicated cluster. The typical measurement results are provided.

Key words: Distributed and parallel, Cluster, Network flow, Communication delay